Plot spoilers pose ‘Downton Abbey’ challenge

LOS ANGELES – There are many delicious reasons to watch the returning “Downton Abbey” and an exasperating one to skip it: The cover’s been blown on major plot twists.

In what may be outsized revenge for the American Revolution – or payback for years of exporting lousy U.S. TV and fast food – the Brits are sharing “Downton Abbey” with us, but only after first airing each season.

That wouldn’t matter much in the drama’s early 20th-century setting but we’re not there, are we, PBS and U.K. network ITV? A little gimmick called the Internet makes it impossible to keep story developments from spreading like germ warfare.

As with sports fans who must avoid all media and big-mouthed friends to keep game scores a surprise, “Downton Abbey” addicts are forced to shun rude news reports and blogs about what happens to character A, B or C (no spoilers here, promise).

Heedlessly type in “Downton Abbey season three” online and you risk stumbling into the startling truth that … well, never mind. If you know, you have our sympathy. If you don’t, live in blessed ignorance and careful isolation from Sunday’s debut until the Feb. 17 season finale.

“It is unfair that England gets to see ‘Downton Abbey’ before us because we beat them in a war” was the saucy comment posted on Twitter by producer Damon Lindelof of “Lost” fame.

It’s certainly a development galling enough to draw insults. But as Downton’s courtly master, Lord Grantham (Hugh Bonneville), once rebuked a blunt-spoken visitor: Steady on, sir, the ladies have suffered quite enough of a shock!

Rebecca Eaton, executive producer of PBS’ “Masterpiece” showcase that’s home to “Downton,” contends it’s premature to assess the impact here of the U.K. airing that wrapped Christmas Day. Will ratings be dented by dampened enthusiasm or piracy?

“It will be difficult to say until it airs in this country,” Eaton said, with the size of the audience providing a key measurement.

The bar is high compared with last year, when “Downton Abbey” became the most-watched series ever for “Masterpiece” with more than 17 million viewers across seven episodes. With its swooning, buzz-worthy romances, the drama also fed social media and gave PBS a new veneer of cool.

But what’s to be done if the season endgame is stuck in your brain? As a famous Brit said in more dire circumstances, never surrender! Go along for the ride that the beautifully produced soap opera-cum-fairy tale offers, admiring how the devilishly clever Julian Fellowes, its creator and writer, foreshadows the events to come.

As Downton’s residents adjust to post-War War I England, “there are chills and spills involved in that for all the characters, some laughs and some tears,” as Fellowes neatly summed it up.